Rated 4 out of 5 stars
It's definitely useful as one step up from the Places' "most visited pages" folder, but in its current state, the add-on is not something I'm going to use daily.
Visually, I'm turned off by oversized pixelized favicons. Despite one of the reviews below, which advises to "do an interpolation", I think that would actually be even worse than scaling each pixel 2 or 3 times in every dimension without interpolation. Don't scale favicons at all, please.
I'm also missing the ability to remove unwanted pages from the auto dial page, the feature present in Places. Not every page I frequently visited in the past is going to be of much use to me in the future.